java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/conc/lamport_safe.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:46:37,813 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:46:37,816 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:46:37,831 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:46:37,832 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:46:37,832 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:46:37,834 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:46:37,837 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:46:37,839 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:46:37,840 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:46:37,841 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:46:37,842 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:46:37,842 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:46:37,843 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:46:37,844 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:46:37,848 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:46:37,850 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:46:37,851 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:46:37,861 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:46:37,862 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:46:37,863 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:46:37,865 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:46:37,865 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:46:37,865 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:46:37,869 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:46:37,871 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:46:37,871 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:46:37,872 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:46:37,875 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:46:37,876 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:46:37,876 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:46:37,877 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:46:37,877 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:46:37,878 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:46:37,878 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:46:37,880 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:46:37,898 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:46:37,898 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:46:37,898 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:46:37,898 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:46:37,899 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:46:37,900 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:46:37,902 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:46:37,903 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:46:37,903 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:46:37,903 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:46:37,903 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:46:37,903 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:46:37,904 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:46:37,904 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:46:37,904 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:46:37,904 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:46:37,904 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:46:37,904 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:46:37,905 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:46:37,907 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:46:37,907 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:46:37,948 INFO ]: Repository-Root is: /tmp [2018-06-22 14:46:37,963 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:46:37,969 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:46:37,971 INFO ]: Initializing SmtParser... [2018-06-22 14:46:37,971 INFO ]: SmtParser initialized [2018-06-22 14:46:37,972 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/conc/lamport_safe.smt2 [2018-06-22 14:46:37,973 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:46:38,055 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/lamport_safe.smt2 unknown [2018-06-22 14:46:38,336 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/lamport_safe.smt2 [2018-06-22 14:46:38,340 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:46:38,349 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:46:38,349 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:46:38,349 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:46:38,349 INFO ]: ChcToBoogie initialized [2018-06-22 14:46:38,352 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,400 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38 Unit [2018-06-22 14:46:38,401 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:46:38,401 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:46:38,401 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:46:38,401 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:46:38,424 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,424 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,440 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,440 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,455 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,456 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,458 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... [2018-06-22 14:46:38,461 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:46:38,461 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:46:38,461 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:46:38,461 INFO ]: RCFGBuilder initialized [2018-06-22 14:46:38,462 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:46:38,487 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:46:38,487 INFO ]: Found specification of procedure False [2018-06-22 14:46:38,487 INFO ]: Found implementation of procedure False [2018-06-22 14:46:38,487 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:46:38,487 INFO ]: Found specification of procedure state [2018-06-22 14:46:38,487 INFO ]: Found implementation of procedure state [2018-06-22 14:46:38,487 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:46:38,487 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:46:38,487 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:46:38,820 INFO ]: Using library mode [2018-06-22 14:46:38,821 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:46:38 BoogieIcfgContainer [2018-06-22 14:46:38,821 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:46:38,822 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:46:38,822 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:46:38,831 INFO ]: TraceAbstraction initialized [2018-06-22 14:46:38,831 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:46:38" (1/3) ... [2018-06-22 14:46:38,832 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fa7406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:46:38, skipping insertion in model container [2018-06-22 14:46:38,832 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:46:38" (2/3) ... [2018-06-22 14:46:38,832 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fa7406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:46:38, skipping insertion in model container [2018-06-22 14:46:38,832 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:46:38" (3/3) ... [2018-06-22 14:46:38,834 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:46:38,845 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:46:38,855 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:46:38,895 INFO ]: Using default assertion order modulation [2018-06-22 14:46:38,896 INFO ]: Interprodecural is true [2018-06-22 14:46:38,896 INFO ]: Hoare is false [2018-06-22 14:46:38,896 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:46:38,896 INFO ]: Backedges is TWOTRACK [2018-06-22 14:46:38,896 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:46:38,896 INFO ]: Difference is false [2018-06-22 14:46:38,896 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:46:38,896 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:46:38,914 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:46:38,925 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:46:38,925 INFO ]: Found error trace [2018-06-22 14:46:38,926 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:46:38,926 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:46:38,931 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:46:38,933 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:46:38,934 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:46:38,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:38,967 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:46:38,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:39,019 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:46:39,218 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:46:39,220 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:46:39,221 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:46:39,222 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:46:39,238 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:46:39,238 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:46:39,241 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:46:39,358 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:46:39,358 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:46:39,359 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:46:39,360 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:46:39,361 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:46:39,384 INFO ]: With dead ends: 13 [2018-06-22 14:46:39,384 INFO ]: Without dead ends: 13 [2018-06-22 14:46:39,386 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:46:39,404 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:46:39,423 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:46:39,424 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:46:39,425 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:46:39,426 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:46:39,426 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:46:39,426 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:46:39,426 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:46:39,426 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:46:39,427 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:46:39,428 INFO ]: Found error trace [2018-06-22 14:46:39,428 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:46:39,428 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:46:39,428 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:46:39,428 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:46:39,428 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:46:39,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:39,429 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:46:39,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:39,477 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:46:39,710 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:46:39,710 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:46:39,710 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:46:39,717 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:46:39,777 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:46:39,784 INFO ]: Computing forward predicates... [2018-06-22 14:46:40,352 WARN ]: Spent 244.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-06-22 14:46:40,545 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:46:40,565 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:46:40,565 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:46:40,565 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:46:40,566 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:46:40,566 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:46:40,566 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:46:41,057 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:46:41,057 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:46:41,057 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:46:41,057 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:46:41,057 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:46:41,058 INFO ]: With dead ends: 15 [2018-06-22 14:46:41,058 INFO ]: Without dead ends: 15 [2018-06-22 14:46:41,059 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:46:41,059 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:46:41,062 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:46:41,062 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:46:41,062 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:46:41,062 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:46:41,062 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:46:41,062 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:46:41,062 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:46:41,062 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:46:41,063 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:46:41,063 INFO ]: Found error trace [2018-06-22 14:46:41,063 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:46:41,063 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:46:41,063 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:46:41,063 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:46:41,063 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:46:41,063 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:41,064 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:46:41,064 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:41,140 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:46:41,798 WARN ]: Spent 513.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 14 [2018-06-22 14:46:41,965 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-06-22 14:46:42,041 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:46:42,041 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:46:42,041 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:46:42,048 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:46:42,108 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:46:42,108 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:46:42,112 INFO ]: Computing forward predicates... [2018-06-22 14:46:42,629 WARN ]: Spent 258.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 13 [2018-06-22 14:46:42,926 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:46:42,947 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:46:42,947 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 14:46:42,947 INFO ]: Interpolant automaton has 11 states [2018-06-22 14:46:42,947 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 14:46:42,947 INFO ]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:46:42,949 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 14:46:43,075 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2018-06-22 14:46:43,147 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:46:43,147 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:46:43,148 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:46:43,148 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 14:46:43,148 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:46:43,148 INFO ]: With dead ends: 17 [2018-06-22 14:46:43,148 INFO ]: Without dead ends: 17 [2018-06-22 14:46:43,149 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:46:43,149 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:46:43,151 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:46:43,151 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:46:43,152 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:46:43,152 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:46:43,152 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:46:43,152 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:46:43,152 INFO ]: Interpolant automaton has 11 states. [2018-06-22 14:46:43,152 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:46:43,153 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:46:43,153 INFO ]: Found error trace [2018-06-22 14:46:43,153 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:46:43,153 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:46:43,153 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:46:43,153 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:46:43,153 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:46:43,154 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:43,154 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:46:43,154 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:46:43,210 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:46:43,653 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:46:43,787 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:46:43,787 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:46:43,787 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:46:43,803 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:46:43,878 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:46:43,878 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:46:43,882 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown